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上海证券交易所今年7月1日推出的上证180指数顺应了市场发展的需要,也是上海证券市场发展到一定时期的必然产物和时代选择。 上证180指数在继承上证30指数编制的优点的基础之上,进行了创新编制,这种创新体现在以下几个方面:(1)样本股个数定在180家,180家样本股的市场覆盖率符合国际惯例,即50％以上,使得上证180指数的市场代表性高于上证30指数,克服了目前上证30指数市场代表性不足的缺点;(2)指数加权方法由上证30指数的流通
The SSE 180 Index launched by the Shanghai Stock Exchange on July 1 this year conforms to the needs of the market development and is also an inevitable outcome of the development of the Shanghai securities market to a certain period and the choice of the times. The SSE 180 Index is innovatively formulated on the basis of inheriting the advantages of the SSE 30 index. The innovation is reflected in the following aspects: (1) The number of constituents is set at 180 and the market coverage of 180 constituents The rate is in line with international practice, that is, more than 50%, making the market representative of the SSE 180 index higher than the SSE 30 index and overcoming the shortcomings of the current SSE 30 index market. (2) The exponential weighting method consists of the circulation of the SSE 30 index